Packing-ring.



No. 743,179. V (PATENTEDA Nov. 3, 1903. T. F. MEEHAN. PACKING RING. APPLICATION FILED AUG. 28, 1903.

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PATENTED NOV. 3, 1903.

T. F. MEBHANJ PACKING RING. APPLICATION FILED AUG. 2a. 1903.

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PATENT OFFICE.

PACKING-RING.

SPECIFICATION forming part of Letters Patent No. 743,179, dated November 3, 1903.

Application filed August 28, 1903- Serial No. 171,073. (No model.)

To all whom it may concern.-

Be it known that I, THOMAS F. MEEI-IAN, a citizen of the United States, and a resident of the city of New York, borough of Brooklyn, in the county ofKings and State of New York, have invented a new and Improved Packing- Ring, of which the following is a full, clear, and exact description.

This invention relates to improvements in packing-rings for pistons, piston-valves, and the like, an object being to provide a packing-ring of novel construction and so arranged as to maintain and stand a uniform pressure in the piston or valve-cylinder.

I will describe a packing-ring embodying my invention and then point out the novel features in the appended claims.

Reference is to be had to the accompanying drawings,forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is an elevation, partly insection,

r of a piston and packing-rings embodying my invention. Figs. 2 and 3 are views of a pair of rings. Figs. 4, 5, and 6 are sectional views showing modifications, and Fig. 7 is a section showing my invention as applied to a pistonvalve.

Referring to the drawings, 1 designates a piston operatingin a cylinder 2,and arranged in annular channels in the piston, as here shown, are two pairs of packing-rings. It is to be understood, however, that the number may be increased if deemed necessary, or, in fact, one pair alone may be employed, de-

pending upon the size or area of the piston.-

Each pair comprises a ring 3, open at one side, as indicated at 4, and a ring 5, which is also open at one side, as indicated at 6. The ring 3 is provided with an annular rib 7 for engaging in an annular channel 8, formed in the ring 5, and secured to the ring 5 is a block 9, which enters the opening 4 of the ring 3. The ring 5 is placed at the side toward the end of the piston, and at this side it is provided with an annular flange 10, which is inclined or beveled, forming an abutment for steam passing through inclined ports 11,

formed in the end of the piston.

In the operation during the piston movement steam will enter through the ports 11 and impinging upon the inclined flanges will force the rings out tightly against the cylinder, and the interlocking connection between the two rings of a pair will cause the rings to be carried together.

In practice the rings will be made of slightlygreater diameter than the piston diameter. The block 9 will prevent any rotary movement of one ring relatively to the other.

In Fig. 4 I show two rings 12 13, similar to the ring 5, first described, placed back to back, one ring being provided with an annular rib 14 for engaging in a channel 15 of the other ring, and steam is admitted to the beveled flanges through ports 16 17.

In Fig. 5 the two flanged rings 18 19 are channeled in their adjacent faces to receive the ribs 20 21 on the rings 22 2 3, and in Fig. 6 I employ in connection with the rings 18 19 a single ring 24, having ribs on its opposite sides.

In Fig. 7 I illustrate the invention in connection with a piston-valve 25, operating in a steam-chest 26. In this example steam is admitted to two pairs of rings 12 13, similar to the rings shown in Fig. 4, through ports 27 28 when steam is taken from the innerside of the valve-heads; but when steam is taken from the outer side the ports are to be as indicated in dotted lines.

Having thus described my invention, I claim as new and desire to secure by Letters Patent-- 7 1. A packing for pistons or the like, comprising a pair of rings, each open at one side, one of said rings having a channel, and the other of said rings having a rib for engaging in said channel and an interior annular flange on one of the rings having an inclined stean1- abutment surface.

2. A packing for pistons or the like, comprising a pair of rings, each open at one side, one of said rings having an annular channel, the other of said rings having an annular rib for engaging in said channel, the said channeled ring having an annular flange at its op- .posite side from that of the channel, and ports leading through the piston to direct steam to said flange.

3. A packing for pistons or the like, comprising a pair of rings each open at one side, one of said rings having an annular channel, the other of said rings having an annular rib for engaging in said channel, the said chan- I name to this specification in the presence of neled ring having an annular flange at the optwo subscribing Witnesses.

posite side from that of the channel, the said flange having an inclined surface, and ports THOMAS MEEHAN' 5 leading through the piston to direct steam to Witnesses:

said flange. J NO. M. BITTER,

In testimony whereof I have signed my F. W. HANAFORD. 

